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MALPEDIA_Win_Halfrig_Auto

autogenerated rule brought to you by yara-signator

MalwareHalfrigMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Halfrig.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-halfrig-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Halfrig_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "2112816c-0271-5bde-a230-252c3624eee7"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.halfrig"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.halfrig_auto.yar#L1-L128"
		license_url = "N/A"
		logic_hash = "54f2eefc07ca2891769c542d5253d31db4cfcce9bd5cb522e73feea90cd0de51"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { 498bcf 8802 488d542420 e8???????? 488d0d64eb0700 e8???????? }
		$sequence_1 = { 498bcf 8802 488d542420 e8???????? 488d0d40470700 e8???????? }
		$sequence_2 = { 488d0d384f0700 e8???????? 40383d???????? 7435 488bd3 4c8bc7 43301438 }
		$sequence_3 = { 40883d???????? 4c893d???????? 488d8d30030000 488d05fcf70300 488bd6 }
		$sequence_4 = { 4c898ee0000000 3905???????? 7e4a 488d0df0970400 e8???????? }
		$sequence_5 = { 4833d0 4981f801040000 72d8 40883d???????? 4c893d???????? 488d8d30030000 488d05ec650300 }
		$sequence_6 = { 0fb600 498bcf 8802 488d542420 e8???????? 488d0d48040600 e8???????? }
		$sequence_7 = { 8801 418b06 3905???????? 0f8ea3000000 488d0dcf4f0700 e8???????? 833d????????ff }
		$sequence_8 = { 8801 418b06 3905???????? 0f8ea3000000 488d0defba0700 e8???????? 833d????????ff }
		$sequence_9 = { 40883d???????? 4c893d???????? 488d8d30030000 488d052cfb0400 488bd6 660f1f840000000000 488d8980000000 }

	condition:
		7 of them and filesize < 1369088
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 498bcf 8802 488d542420 e8???????? 488d0d64eb0700 e8???????? }
$sequence_1hex{ 498bcf 8802 488d542420 e8???????? 488d0d40470700 e8???????? }
$sequence_2hex{ 488d0d384f0700 e8???????? 40383d???????? 7435 488bd3 4c8bc7 43301438 }
$sequence_3hex{ 40883d???????? 4c893d???????? 488d8d30030000 488d05fcf70300 488bd6 }
$sequence_4hex{ 4c898ee0000000 3905???????? 7e4a 488d0df0970400 e8???????? }
$sequence_5hex{ 4833d0 4981f801040000 72d8 40883d???????? 4c893d???????? 488d8d30030000 488d05ec650300 }
$sequence_6hex{ 0fb600 498bcf 8802 488d542420 e8???????? 488d0d48040600 e8???????? }
$sequence_7hex{ 8801 418b06 3905???????? 0f8ea3000000 488d0dcf4f0700 e8???????? 833d????????ff }
$sequence_8hex{ 8801 418b06 3905???????? 0f8ea3000000 488d0defba0700 e8???????? 833d????????ff }
$sequence_9hex{ 40883d???????? 4c893d???????? 488d8d30030000 488d052cfb0400 488bd6 660f1f840000000000 488d8980000000 }

Condition

7 of them and filesize < 1369088

In plain words (Heuristic)

  • The file must be smaller than 1369088 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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References

Licence & attribution

Author: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 2112816c-0271-5bde-a230-252c3624eee7

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE